21518431

素因数分解:

${\mathrm{11}}^1\times {\mathrm{19}}^1\times {\mathrm{149}}^1\times {\mathrm{691}}^1$

素因数の和:870

約数の個数: 16

約数和(自身を含む): 24912000

約数和(自身を除く): 3393569

約数列:

[1, 11, 19, 149, 209, 691, 1639, 2831, 7601, 13129, 31141, 102959, 144419, 1132549, 1956221, 21518431]

約数ペア:

[(1, 21518431), (11, 1956221), (19, 1132549), (149, 144419), (209, 102959), (691, 31141), (1639, 13129), (2831, 7601)]